package com.dzpk.facadeserver.util;

import java.security.MessageDigest;

public class Encrypt {

    public static native byte[] oi_symmetry_encrypt2(byte[] data);

    public static native byte[] oi_symmetry_decrypt2(byte[] data);

    static {
        // System.loadLibrary("encrypt");
    }

    private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D",
            "E", "F" };

    /** 把inputString加密 */
    public static String md5(String inputStr) {
        return encodeByMD5(inputStr);
    }

    private static String encodeByMD5(String originString) {
        if (originString != null) {
            try {
                // 创建具有指定算法名称的信息摘要
                MessageDigest md5 = MessageDigest.getInstance("MD5");
                // 使用指定的字节数组对摘要进行最后更新，然后完成摘要计算
                byte[] results = md5.digest(originString.getBytes());
                // 将得到的字节数组变成字符串返回
                String result = byteArrayToHexString(results);
                return result;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    /**
     * * 轮换字节数组为十六进制字符串 *
     * 
     * @param b
     *            字节数组 *
     * @return 十六进制字符串
     */
    private static String byteArrayToHexString(byte[] b) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++) {
            resultSb.append(byteToHexString(b[i]));
        }
        return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n = 256 + n;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    public static void main(String[] args) {
        String str = "baidu.com";
        System.out.println(md5(str).toLowerCase());
    }

}
